Question

How does the muscular system help humans maintain posture?
Muscles continually align themselves vertically to help maintain posture.
Muscles continually push bones to be straight.
Muscles constantly contract and relax to help fight gravity.
Muscles constantly contract and relax to help work with gravity.

Answer 1

Categorize the following: intestinal muscles, heart muscles, hand muscles, and neck muscles.
Intestinal and neck muscles are skeletal muscles; heart and hand muscles are smooth muscles.
Heart and neck muscles are long and slender; hand and intestinal muscles are spindle shaped.
Intestinal and heart muscles are involuntary muscles; hand and neck muscles are voluntary muscles.
Heart and intestinal muscles allow for big movements; hand and neck muscles allow for smooth movements.

A teacher makes the analogy that stem cell research did for medicine what the Internet did for communication. What is meant by this analogy?
Stem cells allow for communication between cells.
Stem cells were a huge leap in technology that opened many doors.
Stem cells were a setback in technology that restricted opportunities.
Stem cell information is stored in databases online.

How does the structure of the skeletal muscle help it perform its function?
Its spindle-shaped cells allow it to do smooth movements.
Its striations allow for big movements.
Its nucleated cells allow it to trigger involuntary actions.
Its discs allow it to coordinate movement with other cells.

Answer 2

@Awolflover1 @yolo_gogo @Wolfboy @LetsLearn2000

Answer 3

I'd say 3, 3, 2, 2. Muscles contract and relax and help the body fight gravity. Heart and intestinal muscles move involuntarily while the other two can be controlled by thought. Stem cells were a huge leap in technology and though the last question is not a great question, the other three answers all have componenets that apply to either smooth or cardiac muscle and not skeletal muscle. (spindle, involuntary and disc do not apply to skeletal muscle).