21- Which is a hormone that reduces blood volume and pressureand increases urine volume?
Select one:
a. atrial natriuretic hormone
b. aldosterone
c. renin
d. erythropoietin
22- Which of the following is a chemical signal that diffusesacross the gap between adjacent neurons to convey a message to thenext cell?
Select one:
a. synapse
b. dendrite
c. action potential
d. neurotransmitter
23- Acetylcholine is a neurotransmitter released at everyneuromuscular junction (the junction of a motor neuron and askeletal muscle cell), where it triggers contraction of voluntary(skeletal) muscles.
Select one:
True
False
24- Which pathogen would most likely be responsible for aurinary tract infection caused by improper wiping afterdefecation?
Select one:
a. Salmonella
b. Escherichia coli
c. Chlamydia
d. Mycoplasma
25- Which of the following does not normally move to any greatextent from the blood into the filtrate at the renal corpuscle?
Select one:
a. urea
b. hydrogen ions
c. plasma proteins
d. water
26- The organ(s) of the respiratory system that contain alveoliare ________.
Select one:
a. lungs
b. bronchi
c. the glottis
d. bronchioles
27- Nephrons are the functional units of the kidneys and areresponsible for the formation of urine.
Select one:
True
False
28- Which of these diseases involves the destruction of themyelin sheath on certain neurons within the brain and spinalcord?
Select one:
a. Alzheimer's disease
b. multiple sclerosis
c. Parkinson's disease
d. depression
29- Food traveling through the pharynx would next go to thestomach.
Select one:
True
False
30- Which neurotransmitter appears to be associated with anenergizing \"good\" feeling and is essential in hunger, thirst, andsex drive?
Select one:
a. dopamine
b. synapse
c. norepinephrine
d. serotonin
31- The specialized membrane proteins that actively transportsodium and potassium ions across the plasma membrane are known asthe ________.
Select one:
a. sodium-manganese pump
b. sodium pump
c. sodium-chloride pump
d. sodium-potassium pump
