HSCI 101 Exam 3 LC 7

Which of the following functional segments is matched correctly with it's function?

Transmissive segment - Release neurotransmitters

Identify whether the ions would move in or out of the cell if their respective channel or pump was open (Leaky Na⁺channel

In

Identify whether the ions would move in or out of the cell if their respective channel or pump was open. (Voltage-gated K⁺ )

Out

Identify whether the ions would move in or out of the cell if their respective channel or pump was open. (Chemically-gated Cl^-channel)

In

Identify whether the ions would move in or out of the cell if their respective channel or pump was open. (Ca²⁺ pump)

Out

What part of the nervous system is responsible for you being able to smell fresh baked cookies?

Somatic sensory division of PNS

Which of the following is true regarding the ossification of the humerus bone?

It froms from cartilage.

How does the release of parathyroid hormone (PTH) affect blood calcium levels?

Increases blood calcium.

Which of the following is a component of endosteum? Select all that apply.

Osteoblasts

Osteoclasts

Osteoprogenitor cells

Which of the following statements is not true regarding bone growth?

The zone of proliferation within the epiphyseal plate contains actively dividing osteocytes.

Match the following statements to the correct letter in the image below.

A- 5. Contains nucleus, organelles, and can receive stimuli

B- 4. Receives input and sends them towards cell body

C- 2. Junction between the cell body and axon.

D- 1. Generates and spreads action potentials down plasma membrane

E- 3. Contains synaptic vesicles filled with neurotransmitters

Identify the histological structure highlighted in pink.

Interstitial lamellae

Identify whether there would be a depolarization or hyperpolarization of the membrane potential if the following channels or pumps were open. (Leaky K⁺channel)

Hyperpolarization

Identify whether there would be a depolarization or hyperpolarization of the membrane potential if the following channels or pumps were open. (Voltage-gated Ca²⁺⁾

Depolarization

Identify whether there would be a depolarization or hyperpolarization of the membrane potential if the following channels or pumps were open. (Chemically-gated cation channel)

Depolarization

Identify whether there would be a depolarization or hyperpolarization of the membrane potential if the following channels or pumps were open. (Chemically-gated Cl^-channel)

Hyperpolariztion

What structure connects adjacent central canals?

Volkmann's (Perforating) Canal

Which of the following statements is false regarding the initial segment?

It contains voltage-gated Ca²⁺ channels.

Which of the following channels or pumps opens in response to a ligand binding to a protein in the plasma membrane?

Chemically-gated channel

Which of the following is false regarding neurons?

Neurons regulates what enters and leaves the brain.

Highlighted in blue are epiphyseal plates. Which of the following statements is true regarding the highlighted structures?

It connects two bones by cartilage.

Over the summer you spent a nice sunny day at the beach. Following, the beach you went home to hydrate by drinking a big glass of milk. Thinking about your blood calcium levels, how would your bones react in this situation?

Bones will increase bone deposition

Nerve fibers that send signals to the heart can either speed up or slow down the heart's rate of contraction. Which part of the nervous system do these nerve fibers belong to? 

Visceral motor PNS/autonomic nervous system

Which bone cell and definition are correctly matched

Osteocytes : bone maintenance

A hypothetical drug inhibits the action of enzymes. How would this affect bone remodeling?

There would be a decrease in bone resorption.