Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Alaijah Goswami
Physiology Assignment 1 (1-6 WK)
| Question | Answer |
|---|---|
| Before a muscle contracts, what must happen? | A message (impulse) from the brain travels through the spinal cord and motor neurons to the muscle. INTERESTING FACT: These steps are necessary for muscle movement. |
| What happens when the impulse reaches the motor neuron? | Acetylcholine (ACh) is released into the synaptic cleft, binds to receptors on the muscle cell, and allows the impulse to spread over the muscle membrane. INTERESTING FACT: ACh is crucial for transmitting the signal to the muscle. |
| How does the impulse travel deeper into the muscle? | It moves through small tunnels called T-tubules, reaching the sarcoplasmic reticulum, which stores calcium (Ca++). INTERESTING FACT: T-tubules help spread the signal throughout the muscle. |
| What happens when the impulse reaches the sarcoplasmic reticulum? | It triggers the release of Ca++ into the muscle cell, which then binds to troponin and moves tropomyosin out of the way. INTERESTING FACT: This exposes actin-binding sites, allowing muscle contraction. |
| How does the muscle relax after contraction? | The Ca++ pumping system moves calcium back into the sarcoplasmic reticulum, allowing the muscle to relax. INTERESTING FACT: Without this system, muscles would stay contracted. |
| What are functions of the parathyroid gland? | It regulates calcium levels in the blood by releasing parathyroid hormone (PTH). INTERESTING FACT: PTH prevents calcium imbalances that affect bones, muscles, and nerves. |
| What happens if the parathyroid gland fails to sense high calcium levels? | It causes an imbalance, leading to excessive bone breakdown, weak bones, kidney stones, muscle weakness, and heart problems. INTERESTING FACT: Too much calcium in the blood can be harmful. |
| What happens if there isn’t enough PTH? | It stops calcium from being taken from the bones, kidneys, and intestines, leading to weak bones, cramps, tingling, and even seizures. INTERESTING FACT: Vitamin D is important for calcium absorption and bone health. |
| How does the skin protect the body? | The epidermis protects against harmful environmental substances, such as chemicals, germs, and debris. INTERESTING FACT: The skin produces sebum, making it harder for germs to penetrate. |
| What are the six main types of enzymes? | Oxidoreductases, transferases, hydrolases, lyases, isomerases, and ligases. INTERESTING FACT: Enzymes are named by adding "-ase" to the action they perform, like lactase for breaking down lactose. |
Created by:
AlaijahG
Popular Physiology sets