The ANS provides the chief nervous control in which of the following activities?
following a moving object with the eyes
removing a hand reflexively from a hot object
typing
digesting food
writing an essay
When a pregnant female lies on her back, the weight of the uterus and developing fetus can compress the inferior vena cava, resulting in _____.
erratic tremor and cramps in pelvic and leg muscles
sudden hypertension and large amounts of protein in the urine
decreased blood flow to the placenta, leading to oxygen starvation of the fetus
decreased venous return in the lower limbs, leading to varicose veins
increased production of lactic acid by cramping abdominal uterine muscles
Which of the following about gray rami is FALSE?
They carry preganglionic axons from the anterior rami to trunk ganglia.
They contain only sympathetic nerve fibers.
They carry impulses from sympathetic trunk ganglia to spinal nerves.
They are located at all levels of the vertebral column.
They contain only unmyelinated axons.
How long after fertilization does implantation of an embryo usually occur?
30 minutes
1 day
3 days
1 week
3 weeks
Which of the following does NOT accurately describe mammary gland/breast structure?
They are modified sweat glands.
Milk in a lactiferous sinus passes through a lactiferous duct before reaching the nipple.
Lobes of the gland are separated by suspensory ligaments arising from deep fascia.
Each lobe typically has its own lactiferous duct.
The primary determinant of breast size is the amount of adipose tissue, not the amount of glandular tissue.
Which of the following most accurately describes endocrine system function?
It reaches more types of cells and organs than does the nervous system.
It has a shorter duration of action than does the nervous system, but typically reacts more rapidly to stimulation.
It controls effector organs by releasing neurotransmitters into the blood.
b & c
a, b & c
Which of the following endocrine glands is also an exocrine gland?
hypothalamus
ovary
pancreas
thyroid
adrenal
The pelvic splanchnic nerve contains _____ axons.
sympathetic preganglionic
sympathetic postganglionic
parasympathetic preganglionic
parasympathetic postganglionic
Which endocrine organ is physically 4 separate organs?
pancreas
thyroid
parathyroid
adrenal
pituitary
Preganglionic neurons of the autonomic nervous system have their cell bodies in _____.
anterior horns of spinal cord gray matter
lateral horns of spinal cord gray matter
terminal ganglia
posterior root ganglia
sympathetic chain ganglia
Which two fetal membranes contribute to early blood cell formation, but play little role in nutrition or support in humans?
amnion & yolk sac
allantois & yolk sac
yolk sac & chorion
chorion & amnion
amnion & allantois
Postganglionic neurons of the parasympathetic nervous system have their cell bodies in _____. 1. sympathetic chain ganglia 2. posterior root ganglia 3. prevertebral ganglia 4. lateral horns of spinal cord gray matter 5. anterior horns of spinal cord gray matter
1 & 3
3 only
2 only
4 & 5
none of the previous
Way back when you were just a little embryo, you obtained most of your nutrition _____.
from the placenta
from endometrial cells and secretions
by exchange across chorionic villi
a & c
a, b & c
The hypophyseal portal system transports hormones from the _____ to the _____.
neurohypophysis; adenohypophysis
hypothalamus; anterior pituitary
posterior pituitary; anterior pituitary
hypothalamus; pineal gland
none of the previous
The puerperium _____.
refers to the post-delivery period
is the branch of medicine dealing with pregnancy
is another term for parturition
refers to the entire period the developing child is in the female reproductive tract.
none of the above
The sympathetic division of the PNS is characterized by _____.
ganglia which are close to the CNS and distant from the effector
craniosacral outflow
short preganglionic fibers and long postganglionic fibers
a & b
a & c
The anterior ramus of a spinal nerve may carry axons of _____.
somatic motor neurons
sympathetic postganglionic neurons
parasympathetic preganglionic neurons
a & b
a, b & c
Mesoderm gives rise to _____.
muscle
bone
cartilage
b & c
a, b & c
Somatic motor pathways are different from autonomic motor pathways because _____.
somatic pathways utilize a single motor neuron, whereas autonomic require two
only somatic pathways exit from the spinal cord via anterior roots
only somatic pathways reach visceral effectors
somatic pathways involve a ganglion, but autonomic do not
only somatic pathways can cause muscle contraction