1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
NeX [460]
3 years ago
9

Identify the structures of skeletal muscle.

Biology
1 answer:
maksim [4K]3 years ago
7 0

Though the skeletal muscle cells are of different sizes and shapes, the main components of a skeletal muscle cell remain the same. The skeletal muscle is enveloped by a layer of connective tissue called epimysium, it protects the muscles from friction against the bones and other muscles.  

The skeletal muscles are also covered by a fibrous connective tissue called endomysium that insulates each muscle fiber. Underneath the endomysium is the sarcolemma that is the cell membrane of the fibers and underneath that is the sarcoplasm that is the cytoplasm of the cell.  

Each muscle fiber also comprises cylindrical organelles called myofibrils. Each muscle fiber comprises hundreds to thousands of myofibrils. The myofibrils are the bundles of myosin and actin proteins that go through the length of the muscle fiber and plays an essential role in the contraction of muscles.  

The myofibrils are surrounded by a network of tubules and channels known as the sarcoplasmic reticulum, which is stored with calcium and is essential for the contraction of muscles. Each myofibril can be further dissociated into functional repeating segments known as sarcomeres.  


You might be interested in
A harmful mutation can be caused by factors in the environment. True or False?
Scorpion4ik [409]
False is right.....................
3 0
3 years ago
Organisms interact with each other and with the nonliving environment them in a/an ____
LUCKY_DIMON [66]
A community which is a ecosystem
5 0
3 years ago
Amendment X The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved
scoray [572]
The answer is B. 

Good day sir
3 0
3 years ago
Read 2 more answers
Complete each of the sentences with the correct word or words regarding the function and structure of nails.
Anit [1.1K]

Answer:

a. nails are a scalelike modification of the stratum corneum layer of the epidermis  

b. nails form on the dorsal edges of the fingers and toes

c.  fingernails do protect the digits from damage

Explanation:

The stratum corneum consists of the top layer of the epidermis (i.e., skin). Nails represent a modification of the epidermis and they are composed of densely packed dead skin cells (keratinocytes), which are rich in a protective protein called alpha-keratin. The nail plate is the hard keratinized part of the nail. The nail bed is the skin underneath the nail plate. The nails grow from the proximal portion of the nail bed, which is known as the nail matrix. The main function of the nails is to protect the tips of fingers and toes from injury.

5 0
3 years ago
Why the clouds are white?
8090 [49]
Clouds appear white because of scattering. The droplets in the clouds are huge compared to the wave length of light, so all wavelengths scatter at the same time. Hope this helps! :)
5 0
3 years ago
Other questions:
  • Which most common cause of sleep deprivation in the hospital should the nurse consider when planning care? 1. fragmented sleep 2
    12·1 answer
  • Suppose two BbCc mice are crossed together. Assuming that the two genes assort independently, what are the expected phenotypes,
    12·1 answer
  • Which best describes nitrogen fixation? Nitrogen fixation is the process of creating free nitrogen for plants to absorb. Nitroge
    13·2 answers
  • Can anyone say me the answer please ​
    6·1 answer
  • Write the equation for the complete oxidation of glucose in aerobic respiration.
    11·1 answer
  • Which is one characteristic of deep ocean currents?
    15·2 answers
  • Severe combined immunodeficiency (SCID): Group of answer choices is a result of the absence of macrophages or B cells. affects o
    6·1 answer
  • Which types of organisms perform cellular respiration ​
    7·1 answer
  • Why did the black hand assassinate franz ferdinand.
    5·1 answer
  • What is the term for a localized group of organisms belonging to the same species?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!