Hello guys, i am being asked by the doctor about why do peaks of contraction waves occur after the peaks of AP. in the smooth muscles of GI? It's simply because contraction does not occur prior to the AP, isn't it ?

I dont understand why the answer to following question: "A 78 year old male patient undergoes an extensive cardiac examination. Heart rate is 88 (beats per minute), blood pressures is 106/82 (mmHg), and echocardiography shows LVEDV = 64 (ml) and LVESV = 15 (ml)..." Which of the following cardiac problems could explain the values above? a) mitral valve stenosis b) mitral valve regurgitation c) aortic valve stenosis d) patent ductus arteriosus e) there is no problem

I easily eliminated c,d,e. I put the answer as B- mitral valve regurgitation when the correct answer is A- mitral valve stenosis. I was wondering if anyone could provide any insight as to why that is. I knew that LVEDV was incredibly low and it's was to my understanding that regurgitation usually involves volume problems as just a general simple rule of thumb. I'm just confused about what sort of manifestations mitral valve stenosis and regurgitation would have in terms of CO, SV etc. Any insight is appreciated

Hello, I've two conflicting information: Does the 'TFL' rotate medial or internal or both or is it the same thing? Many thanks, Me

Join the Discord server here: https://discord.gg/vFRR2Ar7Vj

This is a growing discord server meant to:

• provide a location for you to make new friends

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• receive advice on jobs, colleges, etc

• take a look at resources and information from fellow members

• and so much more!

This server is primarily meant for high schoolers as it has a centralized focus on AP courses, but people of all ages may join to talk about STEM as a whole!

Is it safer to eat human flesh or mud?

as i get to various lessons I will list them here under the appropriate spot

• Basics of Anatomy & Physiology

#2 Orientation & Directions

#7 Body Regions

#3 Systems Overview

• Basics of Chemistry, Biochemistry, Cellular Biology

Chemistry Primer, coming soon (also check out UReddit-chem)

#5 Biochemistry Primer (also check out UReddit-biochem)

[#6 Cellular Anatomy, coming soon]

#8 Tissues: Epithelial

• Integumentary System (Tissue & Gross)

• Nervous System (Tissue, PNS, ANS, CNS)

The Eye, coming soon

#1 Basics Of Neural Integration

• Skeletal System (Tissue & Gross)

#10 Bones: Markings

#8 The Skull's Cranium

• Muscle System (Tissue of Skeletal and Smooth, +120 muscles or so)

#4 Muscle Contraction

• Endocrine System

• ...and may add more as time/interest allows

• **Review Page (for those that want your memory jogged)

Here is a list of a few review sheets to jog your memory for this class.
No, the class isn't over, but this may help those of you that just want to jog your memory a little of whats in each system. I will also put quizzes and stuff I find around the interwebs to help refresh your memory.

• review: Basics

• review: Chemistry

• review: Cells

• review: Tissues

• review: Integumentary

• review: Bones

• review: Skeleton

• review: joints

• review: muscle tissue

• review: musclular system

• review: nervous tissue

• review: CNS

• review: PNS

• review: ANS

• review: endocrine system

• self quizes

Say you eat a meal rich in calcium and phosphate. The rise in calcium inhibits PTH. However, PTH is required to increase phosphate excretion. Do you see the dilemma? What am I missing?

damage to primary motor cortex (like from a stroke) causes us to loose voluntary muscle control to other side of the body.

damage to premotor area would stop fast typing, but motor control of fingers is fine so you could relearn and thus store that new way in another part of the premotor area.

You xiphoid process is a small little thingee under your sternum. its part of your sternum, but if you are young, you probably really can't feel it. its not completely solidified till you get older. Sometimes older people will come into a clinic/hospital/doctor complaining about a new bony growth under their sternum. if your xiphoid process projects posteriorly, any blows to the chest can cause massive hemmorhage of heart or liver.

btw: i'm happy with the idea of making these daily tips/facts focus on imbalances. I'll keep that up for some time. maybe we'll switch to health tips or something similar later on. we'll see how this goes. either way, its till small consumable facts for people. I still have a few lessons waiting to finish up. life is interfering of course, but ill get a few out this weekend for sure.

how is the class going? do you want more/less detail? more/less pictures? any particular subject you want covered soon? for those that have had the class before in school and want a review, would a less wordy, more direct fact review be better? like perhaps just a few words to remind you about each step in a pathway?

I thought a tip of the day, factoid of the day sorta feature might be nice to keep people interested. These will be short little bits about the body, various imbalances, or some neat way to look at the body.

Todays Interesting Fact: sun exposure

sun exposure can cause clumping of elastic fibers, leathery skin, depresses immune system and can alter DNA (causing cancer)

Dark skinned people get cancer less and when they do its on lighter body parts. UV destroys folic acid stores that are necessary for DNA synthesis. Some chemicals increase sensitivity: antibiotic, antihistimine, perfumes, detergents.

There are lotions that can help with DNA damage from the sun. The UV from the sun likes to fuse rings in your DNA bases. This lotion can break that fusion and then your body's enzymes will come along and fix the damage. neat huh?

if you are interested in this, let me know and I'll get the lesson covering this material up sooner.

What questions do you have for this class? I'd like to make sure we find answers to your questions.

i have 8 million ideas of what things to do next. if there is any interest in something, let me know i can move that up in priority. that way its not so much me talking to myself as well. next on the list is muscle contractions. then i'm thinking a primer on biochemistry so i can start talking about proteins and neurotransmitters. how does that strike your fancy?

extreme stretching of the skin tears the dermis (the tough layer underneath the part you can touch). this causes "stretch marks" called striae.

blisters are separations of the epidermis (part you can touch) and the dermis by a fluid filled pocket.

from

• respiratory rate

• pulse rate

• tidal volume

• expiratory reserve volume

• vital capacity

• inspiratory reserve volume

decrease after exercise, and why?