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Flashcards in Quiz and Test questions for physiology Deck (241)
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1


What are the 2 main functions of the cardiovascular system?

bloodflow to the tissues, pressure of the arteries

2

Which circulatory system is a high pressure system?

systemic arterial circulation

3

Increased hydrostatic pressure is required too perfuse tissues with a high resistance to blood flow. List two tissues resistance to blood flow

heart, kidneys

4

At what point inthe cardiac cycle are the atria filling and the ventricles relaxed?

diastole

 

5

T/F The vena cava carry oxygenated blood.

false

6

The maximum pressure achieved during ventricular contraction is called the

systolic blood pressure

7

The difference between the systolic and diastolic pressure is

pulse pressure

8

During systole/diastole blood in the right/left ventricle is pumped into the lungs through the semilunar valve called the aortic/pulmonic valve

systole, right, pulmonic

9

What part of the brain is responsible for concious thought and interpretation of sesnory information?

cerebrum

10

Nerve impulses are transmitted from neurons to taget tissues via

synapses

11

Which neurotransmitter is always inhibitory?

glycine

12

T/F afferent nerve fibers travel away form the CNS

false

13

Describe how a reflex arc works.

Stimulation of sensory receptor>motor neuron in the CNS (spinal cord or brainstem) sends out an impulse which ends at the target organ>response

14


Mechanical breakdown of food resulting in the increase of surface area for exposure to digestive enzymes is

mastication

15

Release of ____ from the intestine slows down gastric empyting by inhibiting gastric motility

secretion and cholecystokinin

16

The process of slowing down gastic empyting is called

enterogastic reflex

17

Transport of water, ions and nutrients form the gut lumen across the epithelium and into the blood is

absorption

18

Secretion of _____ inhibits muscle activity of the gastric fundus allowing it to relax and fill during ingestion of food

gastrin

 

19

The process of contraction and relaxation of the smooth muscle in the GI tract is known as

peristalsis

20

T/F HCl, pepsin, and gastric are all secreted into the lumen of the stomach

false

21


Durring deglutition the _____ prevents food from entering the trachea

epiglottis

22

Parietal cell is produces

HCL

23

Chief cells produce

pepsinogen

24

G cells produce

gastrin

25

Mucuous cells produce

mucus

26

T/F Motility and secretion in the GI tract are decreased by stimulation by the parasympathetic nervous system

false

27

Gastrin, acetylcholine, and histamine stimulat the secretion of hydrogen and chloride in the stomach by binding to specific receptors on gastric___

parietal cells

28

T/F postaglandins stimulate bicarbonate production and cause enhanced blood flow to the stomach for repair of damage to the gastric epithelial lining

true

29

List two species that cannot vomit. Why?

horse, rabbit because of their anatomy

30

List the parts of the ruminant stomach.

abomasum, rumen, reticulum, omasum