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
Lapatulllka [165]
3 years ago
15

Explain how parts of the upper limb from a first-class lever and a third-class lever

Biology
1 answer:
Jobisdone [24]3 years ago
7 0
A) The first class lever: In this type of lever, <span> the fulcrum in the middle, the force is applied on one side of the fulcrum and the resistance on the other.
When the upper limb strengthens at the elbow,
the forearm bones are the rigid bar, the hand that moves against the resistance by pulling something heavy is the resistance, and the elbow joint is  the fulcrum. The triceps muscle, located on the posterior side of the arm does the force. </span>
<span>
B) A third-class lever in the upper limb is formed when the radio and the ulna bones are the rigid bar of the lever, the elbow joint is the fulcrum, the hand moves against the resistance provided by its weight, and the force is done by muscles like the biceps . This is a third class lever because the parts of this lever are arranged in the sequence resistance(hand)-force(muscles)-fulcrum(elbow). This type of lever also exists in the mandibular bone. Since this may be more complicated to understand, i attached a photo.</span>


You might be interested in
Please help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Mrrafil [7]

Answer:

number 1 answer is 3.

number 2 energy is flowing upwards. ex grasshopper eats the grass, rat or whatever that is eats the grasshopper, and the hawk eats the rat. energy is going up each trophic level.

number 3. if the grass became polluted, then animals would get pollution in their bodies and at some point would die. eventually the grass would die too. primary consumers such as mouse, rabbit, grasshopper/snails would accumulate the most pollution because they directly eat the grass. whatever that is in the grass goes straight into their bodies.

6 0
3 years ago
Animals obtain glucose from blank
grigory [225]

Answer: Cellular Respiration and Mass

Explanation: Animals get glucose by breaking down the food they eat, then  during cellular respiration, glucose combines with oxygen to release energy and to form carbon dioxide and water.

7 0
3 years ago
During the contraction of a protostar, density increases and ________ rises. A) temperature
nydimaria [60]
The nuclear energy would increase

4 0
3 years ago
Read 2 more answers
What type of molecule do animal cells use for long-term energy storage?
spayn [35]

Answer:

fat

Explanation:

only plants use starch as a way if storage of energy. Humans, for example, use fat as a way to store energy

4 0
3 years ago
Bees are common pollinators, and many commercially grown crops that we eat depend on bee pollination Bees' eyesight allows them
nadya68 [22]

Adaptations such as keen eyesight and ability to visualize colors allows the bees to find food while increasing the plants chances of pollination.

<h3>What are adaptations?</h3>

Adaptation refers to the special features an organism possess that enhances its chances of survival in its environment.

The adaptations in bees such as eye structure help them to easily locate flowers to obtain nectar.

The plants themselves are benefited as they can easily get pollinated by the bees.

Therefore, adaptations such as keen eyesight and ability to visualize colors allows the bees to find food while increasing the plants chances of pollination.

Learn more about adaptation at: brainly.com/question/29594

3 0
2 years ago
Other questions:
  • Which of the following is not true concerning the layers of the Earth?
    9·2 answers
  • PLEASE HELP!! I HAVEN'T A CLUE ON THIS
    5·1 answer
  • Which of the following true?
    6·1 answer
  • Potential consequences of being a healthcare worker who is unresponsive to the hepatitis b vaccine
    13·1 answer
  • Word-of-mouth influence comes to consumers from family, colleagues, and ________.
    5·2 answers
  • How can an increase in biodiversity lead to an increase in ecosystem stability?
    7·1 answer
  • Alkaline pancreatic juices work in ___________
    11·1 answer
  • Do temperate phage form plaques? Explain?
    12·1 answer
  • Each homologous pair of chromosomes forms a "tetrad". The name tetrad
    8·1 answer
  • What's a quote in the poem "two kinds" that encouraging
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!