Exam 1

Question 1

Name the 4 types of tissues in the body.

Answer 1

Connective, Muscle, Epithelial, Nervous

Question 2

What is cellular hyperplasia?

Answer 2

Stimulated mitotic division in cells by increased functional demands. Ex:Callouses on hands and feet from work/guitar playing.

Question 3

What is the pH of the blood?

Answer 3

7.4

Question 4

What is a 2mg% solution of sugar?

Answer 4

A solution with 2 mg sugar per 100 mL of water.

Question 5

What is the Nernst Equation?

Answer 5

Esubk = 62mV[log(side2)/(side1)]

Question 6

List the sequence of events that occur at a synapse when an action potential reaches the end of an axon.

Answer 6

1. Action potential reaches the end of the neuron of the pre synaptic neuron 2. Calcium voltage gated channels open on the end of the pre synaptic neuron 3. Neurotransmitter is released as a result of the increased calcium concentration 4. Neurotransmitter is received by the post synaptic neuron to cause it to reach threshold 6. Action potential is generated by post synaptic neuron.

Question 7

Name the classes of neurotransmitter.

Answer 7

Acetylcholine, amino acids (glutamate and aspartate are excitatory), amines, polypeptides, purines (ATP, AMP), gases (NO).

Question 8

What is a paracrine?

Answer 8

Chemical messengers used for cell to cell communication when cells are close to one another. They are released by cells into the intercellular space and received by the LOCAL target cell.