Answer:
A) the concentration of calcium ions in the sarcoplasm of a resting muscle
Explanation:
Sarcoplasmic reticulum is a system of the membranous sac that is present around each myofibril and is filled with calcium ions. When muscles are in the resting stage, calcium ions are stored in the sarcoplasmic reticulum.
As the muscle action potential triggers change in voltage-gated calcium ion channels of the sarcoplasmic reticulum, the channels are opened to release the calcium ions in the sarcoplasm. Increased calcium ion levels in sarcoplasm make the muscle fibers to contract.
Removal of acetylcholine from the synaptic cleft ends the production of muscle action potential and calcium ions are moved back from the sarcoplasmic reticulum.
Hence, lower levels of calcium ions are maintained in sarcoplasm when the muscles are in the resting stage.
Answer:
Explanation:
Below I have listed more than five, choose the ones that you think are better for your assignment!
Here they are:
- Wash hands and surfaces
- Clean refrigerators at least once a week
- Separate foods when shopping
- Separate foods when serving
- Rinse produce
- Making sure nothing else goes in the food such as hair, other ingredients, bugs, etc
Hope this helps!
Answer:
High blood pressure is called hypertension or often referred to as the silent killer as it shows no symptoms at all.
Hope that helps!
Answer:
Heres a link to a labeled diagram of the heart. Sorry I was trying to put a picture in but It wouldn't save as a JPEG file
Link:
https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwjpw8LI4vzlAhVMPn0KHWHnCTkQjRx6BAgBEAQ&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFile%3ADiagram_of_the_human_heart_(cropped).svg&psig=AOvVaw2LsD24TXBtoTcH1kjWCRJC&ust=1574476068782790
Answer:
The correct option is B. It helps the fertilized egg attach to the uterine wall.
Explanation:
The uterus contains some of the strongest muscles of the body. It is made up of three thick layers:
1. The perimetrium 2. the myometrium and 3. the endometrium.
The walls of the endometrium thicken during ovulation and also pregnancy.
When fertilization occurs, the walls of the uterus help the eggs to stick to the uterine walls. The endometrium thickens more and more to protect the egg and to nourish it..
