Biology 109 Unit 4 Exam 2024/2025
Exam Questions with 100% Correct
Answers | Latest Update
Which one of the following is not an advantage of chemical messengers
over electrical signals? - 🧠ANSWER ✔✔chemical molecules initiate faster
responses
In this type of signaling, secreted molecules diffuses locally and trigger a
response in the cells that secrete them. - 🧠ANSWER ✔✔autocrine
Synthesized in the hypothalamus, these hormones travel along the
extended axons of neurosecretory cells to the posterior pituitary. -
🧠ANSWER ✔✔ADH and oxytocin
A form of asexual reproduction in which the egg develops without being
fertilized. - 🧠ANSWER ✔✔parthenogenesis
Conveys the egg that is released by the ovary to uterus - 🧠ANSWER
✔✔oviduct
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STATEMENT. ALL RIGHTS RESERVED
,The thick, yellowish and alkaline fluid produced by these accessory glands
constitutes approximately 60% of the volume of semen. - 🧠ANSWER
✔✔seminal vesicles
The hypothalamic hormone that stimulates hormone secretion by the
anterior pituitary gland - 🧠ANSWER ✔✔GnRH
The movement of the membrane potential from a value of -70 mV to a
value of -80mV would be termed a(n) - 🧠ANSWER ✔✔hyperpolarization
The reason that the resting membrane potential of a neuron is closer to Ek
than to Ena is that the membrane has - 🧠ANSWER ✔✔more open K+
channels than Na+ channels
Threshold stimuli are those which are strong enough to - 🧠ANSWER
✔✔cause a net influx of positively charged Na+ ions from outside to inside
the cell
In a simple synapse, neurotransmitter chemicals are released by the -
🧠ANSWER ✔✔presynaptic membrane
myelinate axons in the CNS - 🧠ANSWER ✔✔oligodendrocytes
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STATEMENT. ALL RIGHTS RESERVED
, produce the myelin sheaths that surround axons in the PNS - 🧠ANSWER
✔✔Schwann cells
immune cells in the CNS that protect against pathogens - 🧠ANSWER
✔✔microglia
participate in formation of the blood-brain barrier - 🧠ANSWER
✔✔astrocytes
The division of the nervous system that have antagonistic or opposing
actions are? - 🧠ANSWER ✔✔sympathetic and parasympathetic
Which area of the brain is most intimately associated with the unconscious
control of respiration and circulation? - 🧠ANSWER ✔✔medulla
What do Wernicke's and Broca's regions of the brain affect? - 🧠ANSWER
✔✔speech
If someone said to you that a particular hormone utilizes a G protein-
coupled receptor in its signal transduction pathway, you would know that
the hormone - 🧠ANSWER ✔✔has receptors on the cell surface
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
Exam Questions with 100% Correct
Answers | Latest Update
Which one of the following is not an advantage of chemical messengers
over electrical signals? - 🧠ANSWER ✔✔chemical molecules initiate faster
responses
In this type of signaling, secreted molecules diffuses locally and trigger a
response in the cells that secrete them. - 🧠ANSWER ✔✔autocrine
Synthesized in the hypothalamus, these hormones travel along the
extended axons of neurosecretory cells to the posterior pituitary. -
🧠ANSWER ✔✔ADH and oxytocin
A form of asexual reproduction in which the egg develops without being
fertilized. - 🧠ANSWER ✔✔parthenogenesis
Conveys the egg that is released by the ovary to uterus - 🧠ANSWER
✔✔oviduct
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
,The thick, yellowish and alkaline fluid produced by these accessory glands
constitutes approximately 60% of the volume of semen. - 🧠ANSWER
✔✔seminal vesicles
The hypothalamic hormone that stimulates hormone secretion by the
anterior pituitary gland - 🧠ANSWER ✔✔GnRH
The movement of the membrane potential from a value of -70 mV to a
value of -80mV would be termed a(n) - 🧠ANSWER ✔✔hyperpolarization
The reason that the resting membrane potential of a neuron is closer to Ek
than to Ena is that the membrane has - 🧠ANSWER ✔✔more open K+
channels than Na+ channels
Threshold stimuli are those which are strong enough to - 🧠ANSWER
✔✔cause a net influx of positively charged Na+ ions from outside to inside
the cell
In a simple synapse, neurotransmitter chemicals are released by the -
🧠ANSWER ✔✔presynaptic membrane
myelinate axons in the CNS - 🧠ANSWER ✔✔oligodendrocytes
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
, produce the myelin sheaths that surround axons in the PNS - 🧠ANSWER
✔✔Schwann cells
immune cells in the CNS that protect against pathogens - 🧠ANSWER
✔✔microglia
participate in formation of the blood-brain barrier - 🧠ANSWER
✔✔astrocytes
The division of the nervous system that have antagonistic or opposing
actions are? - 🧠ANSWER ✔✔sympathetic and parasympathetic
Which area of the brain is most intimately associated with the unconscious
control of respiration and circulation? - 🧠ANSWER ✔✔medulla
What do Wernicke's and Broca's regions of the brain affect? - 🧠ANSWER
✔✔speech
If someone said to you that a particular hormone utilizes a G protein-
coupled receptor in its signal transduction pathway, you would know that
the hormone - 🧠ANSWER ✔✔has receptors on the cell surface
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
