Chapter 1 Flashcards
The pressure in the systemic arteries during ventricular contractions is:
Diastolic blood pressure: is present when the ventricles are relaxed and therefore is a lower pressure than systolic blood pressure
The difference between the systolic and diastolic pressures of the expanding and contracting arterial walls is the:
Pulse: A pal pared pulse is due to a greater pulse pressure
Input from what system causes vasoconstriction during exercise and therefore an increase in blood pressure?
A: systolic nervous system
Cardiac muscle is:
B: striated involuntary
In what order does the impulses for depolarization travel through the heart?
B: SA node, AV node, purkinje fibers, bundle of his
The wave on an electrocardiogram that is associated with the atrial wall depolarization is the:
D: P wave
The SA node is located in the wall of which chamber?
C: Right atrium
The muscular sphincter located between the stomach and the duodenum is the:
A: Pylorus
The type of cell responsible for the transmission of impulses through the nervous system is the:
C:Neuron
What system is anatomically composed of the brain and spinal cord?
A: Central nervous system
Functions that an animal does not have to consciously control, such as peristalsis in the intestine, are influenced by the:
D: Autonomic nervous system
The cranial nerves and the spinal nerves are anatomically part of what system?
B: Peripheral nervous system
Sensory nerves are considered:
D: Afferent
An imbalance of what minerals can affect nerve function?
B: Sodium and potassium
When a stimulus is strong enough to cause complete depolarization, it has reached:
A: Threshold
