Skin, muscles and joints

[DriParker]

Ok, this is my first year takeing biology, and honestly i HATE it. but that's just 'cause i don't understand it! is there ne way y'all can help with some problems i have?


Skin cells divide and multiply in the __________.
epidermis
osteoclasts
dermis
subcutaneous tissues
all of the above

The _________ glands produce oil that lubricates the skin.
sweat
sudoriferous
subcutaneous
sebaceous
none of the above

Most skeletal muscles are found in _______ pairs, meaning that as one ________, the other relaxes.
antagonistic; contracts
metacarpal; stretches
flexible; bends
skeletal; pushes
none of the above

The skull is connected to the spine by a _________ joint, a type of __________ joint.
pivot; synovial
ball-and-socket; synovial
hinge; gliding
gliding; flexible
none of the above

The most flexible type of joint of the body is the ___________.
phalanges
pivot joint
carpal joints
ball-and-socket joint
all of the above

Now, i'm not asking you give me the answers, but could some1 pleez explain it in a way that my 15year old brain can undersatnd????? thanx! ~DriParker~

[MrMistery]

Here is some answers from my 16 yeard old brain
1. I do not know. Deffinetly not osteoclasts because they are found in the bones.
2. It is either sweat or sebaceus. I always get them mixed up!
3.This one i know: think or biceps/triceps. When you want to bend the arm the biceps contracts, it gets shorter and pulls your arm. Meanwhile the triceps is relaxed. When you want to bend it back, you relax the biceps, the triceps contracts, get shorter and pulls your arm back. So the correct answer is?
4. and 5. Can't help you, i do not know how to translate those words into my language

Hmm... I haven't been of much help, have I?

[mith]

1.It's under the epidermis, so it's the dermis. The epidermis is dead cells.
2.Sebaceous, it produces sebum.
3.Antagonistic;contracts. Antagonist = against each other.
5.Most flexible, what's the definition for that? Should be ball and socket though.

[DriParker]

Thanx y'all! MrMistery's 16 year old brain wasn't much help. Mithrilhack helped a LOT thank y'all! ~dri Parker~

[mith]

muhaha, age triumps lol

[MrMistery]

Lol... i guess some of us just do not know bio...

[mith]

I guess our curriculums are very different...for example my teacher has elected to not teach us about krebs or the calvin cycle(she claims it's unnecessarily hard and we wouldn't need to know it for our finals), I read them up myself.

[clarence]

Hey DriParker,

Here are some explanations for the questions.

Skin cells divide and multiply in the __________.
epidermis
osteoclasts
dermis
subcutaneous tissues
all of the above

The answer is epidermis and dermis.

The principal parts of the skin are the epidermis and dermis. The epidermal layers, from deep to superficial, are the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum (in palms and soles of feet) and stratum corneum. Stem cells in the stratum basale undergo continuous cell division, producing keratinocytes, cells that produce keratin, for other layers.

The dermis consists of papillary and reticular regions. The papillary region is composed of areolar connective tissue, tissue consisting of fibers. The reticular region is composed of dense irregular connective tissue, tissue also consisting of fibers called reticular fibers.

The subcutaneous layer (hypodermis) is deep to the dermis and not part of the skin. It anchors the dermis to underlying tissues and organs.

The _________ glands produce oil that lubricates the skin.
sweat
sudoriferous
subcutaneous
sebaceous
none of the above

The answer is sebaceous glands.

Sebaceous (oil) glands are usually connected to hair follicles. Sebaceous glands produce sebum, which moistens hairs and waterproofs the skin. Clogged sebaceous glands may produce acne.

Sudoriferous (sweat) glands are of two types: eccrine and apocrine. Eccrine glands have an extensive ditribution; their ducts terminate at pores at the surface of the epidermis. Apocrine sweat glands are limited to the skin of the axillae, groin and areolae; their ducts open to hair follicles. They begin functioning at puberty and are stimulated during emotional stress and sexual excitement.

There is no such thing as subcutaneous glands.

Most skeletal muscles are found in _______ pairs, meaning that as one ________, the other relaxes.
antagonistic; contracts
metacarpal; stretches
flexible; bends
skeletal; pushes
none of the above

The answer is antagonistic;contracts.

Most skeletal muscles are arranged in opposing (antagonistic) pairs at joints. Within opposing pairs, one muscle, called the prime mover or agonist (= leader), contracts to cause an action while the other muscle, the antagonist (anti = against), stretches and yields to the effects of the prime mover.

The most flexible type of joint of the body is the ___________.
phalanges
pivot joint
carpal joints
ball-and-socket joint
all of the above

The answer is ball-and-socket joints.

Ball-and-socket joints are capable of angular motion and rotation. Pivot joints are capable of rotational motion but not angular motion. The joints at the phalanges, called planar joints, are only capable of gliding motion. The joints at the carpals, called condyloid joints, are only capable of angular motion.

I hope this helps. If you need some clarifications, just ask.

[mith]

Clarence, you seem to know a bit about this, do you know the one about the skull joint?

[Poison]

Thanx y'all! MrMistery's 16 year old brain wasn't much help. Mithrilhack helped a LOT thank y'all! ~dri Parker~

Ask Andrew(MrMistery) about photosynthesis. I bet you will get much more than you need.

[DriParker]

y'all have been SO helpful! especially Clarence! and if i need any help with photosynthesis i'll be sure to asl "MrMystery" lol thanx every1!!!!!!
~ Adrianne "Dri" Parker ~
oh- and tha answer to # 3 is Ball and Socket {sence none of y'all could help there i had to look it up! that took forever lol}

[MrMistery]

I guess our curriculums are very different...for example my teacher has elected to not teach us about krebs or the calvin cycle(she claims it's unnecessarily hard and we wouldn't need to know it for our finals), I read them up myself.

That is awfull!! I mean of course what the teacher tells you doesn't count for anything at the olympics but come on.... Citric acid cycle is probably the most important thing in cellular biology!!!
Mithril, my opinion about your teacher is actally getting worse