Answer:
A) The striations are due to the orderly arrangement of actin and myosin
Explanation:
Smooth muscles are non-striated involuntary muscles which are found in the walls of stomach, urinary bladder, blood vessels...Smooth muscle tissue is composed of spindle-shaped muscle cells with single central nucleus. Like the other two type of muscles (cardiac and skeletal), smooth muscles also have four main functions:
- Contractility-ability to contract. In the case of skeletal muscles it is voluntary, while in cardiac and smooth muscles it is unconscious.
- Excitability-ability to change membrane potential usually by the influence of nervous impulse.
- Extensibility-the capacity to lengthen
- Elasticity-ability to change its length and then return to previous.
Because of the heart beating it makes a thunk noise. Your heart has a suction affect which makes the noise.
Answer:
c
Explanation:
because that is the uterus function
Answer:
Pangaea
Explanation:
When Laurentia and Gondawana, two minor supercontinents, collided, they created the Pangaea supercontinent.
