This document appears to be a quiz on biology concepts related to communication and homeostasis. It contains 34 multiple choice questions testing understanding of topics like homeostasis, temperature regulation, sensory receptors, action potentials, synapses, glands, hormones, and the cardiovascular center of the brain. The questions require defining key terms, naming examples, and describing physiological mechanisms and relationships between different biological systems and components.

1. mrexham.com
A2 OCR Biology
UNIT 1 – Module 1
Communication – Revision Quiz
Total: ____/ 50
____%
Scan this QR code with your
smartphone to take you the relevant
section of mrexham.com

2. mrexham.com
1. Define the term Homeostasis (2)
.....................................................................................................................
.....................................................................................................................
2. Name an example of when positive feedback occurs in humans (1)
.....................................................................................................................
3. Define the term ectotherm (1)
.....................................................................................................................
4. Give two advantages of being an ectotherm (2)
.....................................................................................................................
.....................................................................................................................
5. Name 4 physiological mechanisms used to maintain body temperature if
it rises too high (4)
.....................................................................................................................
.....................................................................................................................
.....................................................................................................................
6. Which part of the brain monitors blood temperature? (1)
...............................................................................................................................
7. Give 3 examples of sensory receptor cells (3)
...............................................................................................................................
...............................................................................................................................

3. mrexham.com
8. At resting potential what is the charge across the membrane? (1)
...............................................................................................................................
9. What do you call a small change in potential across a membrane which is
not big enough to reach the threshold potential? (1)
...............................................................................................................................
10.What channels open when an action potential is generated? (1)
...............................................................................................................................
11.What does the sodium potassium pump move in and out of the cell, and
how does it do it? (2)
...............................................................................................................................
...............................................................................................................................
12.What do you call the period of time after an action potential when it is
impossible to generate another action potential? (1)
...............................................................................................................................
13.How would you describe the cell in term of potential during this time (1)
...............................................................................................................................
14.What do you call the movement of ions along the neurone? (1)
...............................................................................................................................
15.What type of cell makes up the myelin sheath? (1)
...............................................................................................................................

4. mrexham.com
16.How fast can a myelinated neurone conduct an action potential? (1)
...............................................................................................................................
17.What word describes the way the action potential travels down a
myelinated neurone (1)
...............................................................................................................................
18.What is a synapse called that uses acetylcholine as its neurotransmitter?
(1)
...............................................................................................................................
19.How many protein subunits make up the sodium ion channel on the
post-synaptic membrane? (1)
...............................................................................................................................
20.What is the enzyme called that is found in the synaptic cleft? (1)
...............................................................................................................................
21.What causes the vesicles to fuse with the membrane and release
acetylcholine? (1)
...............................................................................................................................
22.Give three roles of synapses (3)
...............................................................................................................................
...............................................................................................................................
...............................................................................................................................

5. mrexham.com
23.Explain the difference between exocrine glands and endocrine glands (2)
...............................................................................................................................
...............................................................................................................................
...............................................................................................................................
24.Name the second messenger involved with the action of adrenaline
pathway (1)
...............................................................................................................................
25.Name the two types of hormone (2)
...............................................................................................................................
...............................................................................................................................
26.Name one hormone or group of hormones released from the adrenal
cortex (1)
...............................................................................................................................
27.Give three effects on the body of adrenaline (3)
...............................................................................................................................
...............................................................................................................................
28.Name two enzymes found in the pancreatic juice (2)
...............................................................................................................................
...............................................................................................................................

6. mrexham.com
29.Name the two types of cell found in the islets of langerhans and what
hormones they produce (2)
...............................................................................................................................
...............................................................................................................................
30.What is the proper biological name for liver cells? (1)
...............................................................................................................................
31.What Is the term used to describe when your blood glucose levels get
too high? (1)
...............................................................................................................................
32.Give two risk factors for type II diabetes (1)
...............................................................................................................................
33.What causes the potassium channels to close in the beta cells? (1)
...............................................................................................................................
34.Where in the brain is the cardiovascular centre located? (1)
...............................................................................................................................
END OF TEST